🚀 Explore the official source code and writeups for challenges from SekaiCTF 2025, designed to enhance your skills in competitive cybersecurity.

OWASP Juice Shop: Probably the most modern and sophisticated insecure web application

A CTF platform designed for A1natas.

The CdsCTF project is an innovative and high-performance CTF platform.

Capture The Flag (CTF) writeups, covering various categories like Forensics, Cryptography, and more. Find step-by-step guides, tools used, and insights gained. Contributions are welcome!

Short challenges

Open source CTF platform

The official documentation of project CdsCTF.

WIP: A CTFd Terminal-UI for y'all.

Sectoolbox is a web-based security platform designed for CTF players & security researchers. It provides deep forensics and exploitation tools directly in your browser!

flagyard ctf

A game where Cardano developers and enthusiasts can try to exploit purposely vulnerable smart contracts and learn about the most common security issues and how to prevent them.

A flexible playground for Android CTF challenges.

A Simple Webhook Bin for CTF Competition

Interactive platform for learning cybersecurity through hands-on web security challenges like SQLi, XSS, and CSRF.

CTFNote is a collaborative tool aiming to help CTF teams to organise their work.

An extensible CTF, where players create and solve EVM puzzles to earn NFTs.

A simple GH action for sending CTFTime event updates to Discord webhook.

1337 Tactics for Real-World Exploitation

Tool to export Juice Shop challenges and hints in data format compatible with CTFd, RootTheBox or FBCTF